#region License
// Copyright (c) 2007 James Newton-King
//
// Permission is hereby granted, free of charge, to any person
// obtaining a copy of this software and associated documentation
// files (the "Software"), to deal in the Software without
// restriction, including without limitation the rights to use,
// copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the
// Software is furnished to do so, subject to the following
// conditions:
//
// The above copyright notice and this permission notice shall be
// included in all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
// OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
// HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
// WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
// OTHER DEALINGS IN THE SOFTWARE.
#endregion

using System;
using System.Collections.Generic;
using System.Text;
using System.Net;

namespace Utilities.Miscellaneous
{
  public static class IPAddressUtils
  {
    public static bool Match(IPAddress target, IPAddress mask)
    {
      if (target == null)
        throw new ArgumentNullException("target");
      if (mask == null)
        throw new ArgumentNullException("mask");

      byte[] targetBytes = target.GetAddressBytes();
      byte[] maskBytes = mask.GetAddressBytes();

      if (targetBytes.Length != maskBytes.Length)
        return false;

      for (int i = 0; i < targetBytes.Length; i++)
      {
        if (targetBytes[i] != maskBytes[i] && maskBytes[i] != 0)
          return false;
      }

      return true;
    }
  }
}
